Car truck



June 18, 1929.

ill

D. S. BARROWS CAR TRUCK Filed March 1927- 4 Sheets-Sheet l June 18,1929. BARROWS 1,717,648

CAR TRUCK Filed March 8, 1927 4 Sheets-Sheet 2 gnvaufoz June 18, 1929.D. s; BARROWS CAR TRUCK 4 Sheets-Sheet 5 Filed March 8, 1927 June 18,1929. BARROWS 1,717,648

CAR TRUCK Filed March 8, 1927 4 SheetsSheet 4 Patented Jime 18, 1929.

DONALD S. BABBOWS, OF ROCHESTER, NEW YORK.

CAR TRUCK.

Application filed March 8, 1927. Serial No. 173,703.

This invention relates to railway car trucks and, more particularly, tocast frames therefor formed to provide room for an increased number ofsprings and constructed so as to have correspondingly increasedstrength.

The principal objectof my invention, generally considered, is theprovision of car trucks formed with side frames in which the bolsterguide columns, at the intermediate portions thereof, are formed withstop portions extending toward each other and adapted to limit downwardmovement of the bolster, said stop portions being alternatively formedwith girder members connecting the side edges thereof providing roomthereabove for the reception of the bolster and room therebeneath forreceiving the associated spring plank, that portion of the tensionmember, beneath the bolster opening, being laterally widened and adaptedfor supporting six spring units, said units being arranged in twotransversely disposed rows of three spring units, the intermediatespring units of each of said rows being positioned along thelongitudinal 'center line of the frame and, when the girder portions areemployed, being preferably arranged between the same.

An object of my invention is the provision of a cast side frame formedwith a compression member, a tension member, bolster guide columnsspacing intermediate portions of said members with the intermediateportions of said bolster guide columns joined by a bridge preferablyformed as two channels with the flanges inwardly disposed and tiedtogether at their ends, said bridge portion being so positioned that theassociated bolster is insertable thereabove and the spring planktherebeneath.

Another object of my invention is the provision of side frameconstruction adapted for use with an increased number of spring units,said units, however, being so arranged that a standard A. R. A. springplank may be employed therewith.

A further object of my invention is the provision of a side frame andbolster construction involving the use of removable flanged wear blocksto'lock the bolster in place with respect to the side frame, therebyobviating the necessity of lowering the bolster to a wider portion ofthe bolster opening for insertion and removal thereof with respect tosaid frame.

A still further object of my invention is the provision of a side frameand spring plank arrangement involving the use of a lower spring platewhich functions, not only to properly position the bolster springs, butalso to lock the spring plank in proper relation with respect to theframe.

Other objects and advantages of the invention relating to the particulararrangement and construction of the various parts will become apparentas the description proceeds.

Referring to the drawings illustrating my invention, the scope whereofis defined by the appended claims:

Figure 1 is a partial side elevation of a truck illustrating oneembodiment of m invention, a portion of a side frame thereo andassociated parts being shown in central longitudinal section. v

Figure 2 is a horizontal sectional view taken on the line 2-2 of Figure1 looking in the direction of the arrows.

Figure 3 is a vertical sectional view on the line 3-3 of Figure 1looking in the direction of the arrows.

Figure 4 is a horizontal sectional view on the line 44 of Figure 1looking in the direction of the arrows.

Figure 5 is a partial side elevation of a side frame illustratinganother embodiment of my invention, a portion thereof being shown incentral longitudinal section, the associated bolster, spring plank andsprings being indicated diagrammatically by dot and dash lines.

Figure 6 is a horizontal sectional view on the line 66 of Figure 5looking in the direction of the arrows.

Figure 7 is a vertical sectional view on the line 7-7 of Figure 5looking in the direction of the arrows.

Figures 8 and 9 are vertical sectional views on the correspondinglynumbered lines of Figure 5 looking in the direction of the arrows.

Referring to the drawings in detail, like parts being designated by likereference characters, and first considering the embodiment of myinvention illustrated in Figures 1 to 4, inclusive, a truck side frame 1of the cast type is partially illustrated although it will be obviousthat some of the advantages of my invention may be secured when usingframes of other than cast construction. Said frame 1 comprises acompression member 2, a tension member 3, and bolster guide columns orstrut portions 4, spacing intermediate portions of said compression andtension members, leaving a bolster or window opening 5 therebetween. Thecompression and tension members are joined at their ends (not shown) andmay be formed with integral journal boxes (not shown) or be adapted forconnection with a desired form of journal box, as will be understood.

For rigidifying the construction of the frame and, at the same time,providing an area for properly supporting an increased number of springunits, the tension member 3, between the bolster guide columns 4, islaterally widened and provided with an upper web 6 serving for thesupport of the bolster springs 7 which are preferably arranged as twolongitudinally spaced rows of transverse] disposed spring units, eachrow, in the em odiment illustrated, comprising three spring units 8.Each spring unit comprises a main or outer coil 9 with or without aninner or supplemental coil 10. In the embodiment illustrated, theextreme spring units of each row are provided with inner coils 10,whereas the intermediate spring units are not provided with such innercoils. It is obvious, however, that the number of spring units providedwith inner coils depends upon the capacity desired under the particularcircumstances.

In order to provide for the assembly of the spring units prior toplacing the same in proper position with respect to the truck, upper andlower spring plates 11 and 12, respectively, are employed, each of saidspring plates being formed with spring positioning collars 13. Thosecollars, which are to position double coil spring units, are preferablyformed of a corresponding relatively small size and those, which are toposition single coil spring units, are preferably formed of acorresponding larger size for properly positioning the outer coils 9,whereby there will be no danger of improperly arranging the spring unitsas it will be impossible to assemble the double coil spring units aboutthe coils intended for the single coil units and, if a single coil unitwere arranged about a coil intended for a double coil unit, it wouldobviously not function in the desired manner.

Each spring plate, in the embodiment illustrated, is formed with a pairof bosses 14, those on the spring plate 11 extending downwardly andthose on the lower plate extending upwardly and in vertical alinementwith those on the upper plate. Said bosses 14 are centrally aperturedand adapted for receiving retaini bolts 15, as illustrated, whereby saidspring units may be assembled and arranged under any desired initialtension prior to insertion for supporting the associated bolster 16.

The upper sprin plate 11 may be con, veniently formed 0 pressedmetalvand provided with substantially conical positioning bosses 17adapted for reception in corresponding depressions or pockets 18 in thebolster. The lower spring plate 12, however, is preferably of castconstruction and provided with downwardly extending collars or bosses 19adapted for reception in corresponding pockets 20 formed in the webportion 6 of the tension member. The associated spring plank 21 isprovided with. registering apertures 22 adapted for the reception of thecollars 19 on the spring plate 12, whereby said spring plank is lockedin proper relation with respect to the associated side frame 1. Oneconstruction for permitting the reception of the spring plank 21 betweenthe spring plate 12 and the web 6 of the tension member is illustratedparticularly in Figure 3 where the web 6 is formed with a downwardlyoffset portion 23 providing the proper space between the spring plate 12and the web 6 for receiving the ends of the spring plank 21 andparticularly the web 24 thereof. It is obvious that the length of thespring plank may vary within wide limits, the construction of the web 6being correspondingly modified and, if desired, it may, therefore, beformed of standard length and, inasmuch as the springs supported thereonare only two in line longitudinally of the frame, the width of thespring plank 21 may also be standard, as will be further explained inconnection with the following modification.

Extending inwardly from the bolster guide columns and overlying thesides of the spring plank 21 are abutment or stop portions 25, saidportions 25 being adapted to limit downward movement of the bolster 16and save the springs from being compressed solid. Said sto portions 25also partially divide the b0 ster opening 5 into an upper partespecially adapted for receiving the bolster and a lower part adaptedfor receiving the spring plank. Inasmuch as the lower part of thebolster opening is not wider than the upper part and the bolster is alsonot adapted for downward moveme'nt beyond the stop portions 25,removable locking means 26 are provided for said bolster. In the presentembodiment, the locking means 26 are formed with outwardly extendinglugs or guide portions 27 with inner faces correspondingly bevelled toembrace and cooperate with the bevelled sides of the bolster guidecolumns 4 and inwardly extending flange portions 28 receivable betweenthe cooperating flange portions 29 on the bolster. The lower portions ofthe locking blocks 26 are preferably flared to provide base portions 30and thesides of the bolster are correspondingly formed, whereby saidblocks may be insertable from beneath to lock the bolster in properposition with respect to the side frame. Of course, these locking blocks26 are preferably inserted before the application of the spring plate 11and springs 7 and, after the bolster 16 is locked in place, said springplate and springs or the whole nest of springs, assembled as beforedescribed, may be properly positioned as illustrated.

In order to rigidify the connection between the bolster guide columns 4and the tension member 3, the lower portions of said. guide columnsmerge into longitudinally extending webs 31 which form outwardcontinuations of the sides of the abutments or stop portions 25 andcontinue outwardly to finally merge with the tops of the inclinedportions 32 of.

the tension member 3 at substantially the elevation of the top of thestop members. The webs 31 continue downwardly substantially in line orslightly inwardly of the inner edges of the bolster guide columns 4 tomeet the top of the tension member 3 substantially at the junctionsbetween the horizontal and inclined portions. The bolster guide columnsare preferably braced transversely with res ect to the tension member bydownwardly aring gusset or rib portions 33. The top edges of the webs 31are preferably reinforced by inwardly extending ribs or beading 34 whichcontinue outwardly on a slight curve, as illustrated, to merge with thecorresponding beading on the tops of the side flanges 35 of the inclinedportions 32 of the tension member.

The inclined portions 32 of the tension member are generallychannel-shaped in cross section as shown most clearly in Figure 4. Asthey extend downwardly and inwardly toward the bolster guide columns,however, the flanges 35 thereof preferably diverge slightly to increasethe width of the member to correspond more nearly with the relativelygreat width of the upper web 6 of said tension member. In order to saveweight, the lower or web ortion 36 of the tension member is preferablyomitted from a point outwardly of and adjacent to the bolster guidecolunms to a point beneath said guide columns where the side flanges orwalls 35 are joined by transverse connecting walls 37, rigidified attheir lower edges by short web portions 38. From a consideration ofFigure 1 particularly, it will be seen that the Webs 37 preferably slopedownwardly and outwardly and the webs 38 extend inwardly therefrom andfunction as cross bracing webs. The omission of the web 36 beneath thebolster opening and guide columns is compensated for, not only bybeading the edges of the apertured portions of the web 36 as indicatedat 39, but by the upper web or spring supporting portion 6 o the tensionmember which, at the junction with the bolster guide columns, isdeflected upwardly and outwardly in line with the tension member for ashort distance as indicated at 40.

On account of the transverse spacing of the six unit nest of sprin s,the spring supporting web .6 is wider t an it is long, thereby webportion 6, thereby forming e ective sup ports for the same. In order tosave weight without materially decreasing the strength of saidreinforcements and, at the same time, provide for core-removal, anaperture 42 is preferably provided in the outer wall of eachreinforcement 41.

For pro erly supporting the web 6 between the anges 35, the webs formingthe reinforcements 41 are preferably continued at reduced depth to formconnecting webs 43, extending beneath the two rows of s rings 7. Fortying the lower edges of the anges 35 together substantially midwaybetween the holster guide columns, a substantially inverted T-shapedconnecting portion 44 is preferably provided.

The construction before described is adapted to permit the bolster to beshimmed with straight pieces of wood between the top of the spring plate11 and the bottom of the bolster. Although the spring plate has beendescribed as provided with locating bosses 17, such bosses may beomitted, thereby giving a flat surface upon which the shims may be aplied.

n account of-the removable flanged wearing pieces 26 for holding thebolster in place and their special shapes enabling them to be movedaround with minimum necessary clearances, said \vearingportions can bereadily moved to inoperative positions, whereby the bolster can beremoved without taking out any other part of the truck except a portionof the nest of springs. On account of the locking of the spring plank inposition by the separate preferably malleable iron spring seat or plate12 by means of bosses or hollow plugs 19 passing through the springplank holes 22 and into suitable pockets in the top web of the frame, itis possible to remove the spring plank by simply lifting the spring seathigh enough to disengage the plugs depending from its under surface. Inaddition to the pockets 20 in the top web of the frame for receiving thespring plate plugs 19, said frame is preferabl lightened by theprovision of longitudinaliy elongated apertures 45 in the web 6, saidapertures being preferably s aced, as illustrated,

construction, thebottom portion of the rein forcement 41 may be providedwith an aperture 46 preferably similar in outline to the aperture 45 butinwardly spaced with respect thereto, as illustrated.

Although my invention is not so limited, I preferably employ standard A.R. A. springs spaced a standard distance apart, that is, both the outercoils 9 and the inner coils 10 are preferably of standard A. R. A.dimensions. The side frame illustrated in the present embodiment isdimensioned to correspond with that of fifty-five ton capacity for whichthe A. R. A. nest of springs comprises four double coil spring units. Itwill, therefore, be seen that, as the arrangement here disclosedprovides for six of said spring units, the normal capacity may beincreased fifty percent if desired. Under ordinary circumstances,however, the extreme transversely positioned spring units would bedouble coil while the intermediate spring units or those positioned onthe longitudinal center line of the frame would be single coil springunits as illustrated. It will, therefore, beseen that a large increasein spring capacity is provided While permitting the employment ofstandard A. springs and a standard A. R. A. spring plank.

Referring now to the embodiment of my invention illustrated in Figures 5to 9, inclusive, a side frame is there shown which is substantiallyidentical with thatof the first embodiment except that, instead ofmerely having stop or abutment portions 25 extending inwardly towardeach other from the bolster guide columns 4*, there are provided bridgeor strut portions 47 extending between the sides of the abutments orstops 25 and spaced a suflicient distance apart to permit the receptionof the intermediate or centrally disposed spring units 8. These bridgeor strut portions 47 are preferably channel-shaped in cross section withsubstantially vertical web portions 48 and inwardly extending flanges49, said flanges being preferably braced to the web portions at aplurality of points by cross bracing webs 50. For strengthening thebridge members transversely of the frame, said flanges 47 preferablyflare longitudinally and toward the longitudinal center line of the sideframe 1 to merge with the abutments 25 adjacent said longitudinal centerline, the outline of the edges of said flanges 47 preferably beingconcentric with the intermediate spring units 8, as shown most clearlyin Figure 6, whereby said sprin units are adapted to be closely embracedbetween the bridge portions 47 and thus securely held in properposition. As in the preceding embodiment, six spring units of standardA. R. A. dimensions are preferably employed, said spring units beingnormally spaced longitudinall of the frameand spaced transversel cientamount flat so that the bolster can be shimmed with straight pieces ofwood as mentioned in connection with the first embodiment. Although thespring arrangement is as in the first embodiment, that is, two springunits longitudinally and three transversely, it is obvious that certainadvantages of my invention may be secured using other springarrangements.

As in the previous embodiment, the bolster 16, shown onlydiagrammatically, may be provided with removable flanged wearing pieceswhich can be taken out without removing all of the springs or the springplank as heretofore described. The compression member 2 and the tensionmember 3 may correspond generally with that of the first embodimentexcept that the tension member is preferably slightly modified toprovide for the reception of a longer spring plank as will now bedescribed.

Referring now particularly to Figure 7, it will be seen that there isshown a spring plank 21 of standard A. R. A. dimensions so that, inviewof the increased width of the spring supporting web 6, said spring plankstops short of the extreme outer edge thereof. Said plank, however, isnot only of standard A. R. A. size but is preferably provided with foursquaring apertures 22 adapted to receive the normal A. R. A. squaringlugs which, in the present embodiment, are omitted and, in placethereof, four normally spaced pockets 20 of a size corresponding withthe apertures 22 are provided. For locking the spring plank 21 in placewith respect to the side frame, the lower spring plate 12 is formed withfour hollow plugs or collars 19 depending from the lower surface thereofand spaced to correspond with the spacing of the apertures 22 and thepockets 20 so that the spring plank is locked in place by merely placingit with the apertures therein registering with the'pockets 20 in theframe and the spring plate 12 placed thereover with the plugs fittingthrough the apertures 22 into the pockets 20 in the frame, therebylocking the plate, plank and frame in squared relation.

In order to compensate for the distance between the bottom of the springplate 12 and the top of the spring supporting web 6, the top of said webmay be offset as in the first embodiment or, alternatively, the springplate 12 may be formed with ribs 51 depending from the bottom thereof tomeet the top of the web 6". The top of the spring plate 12 may be formedwith spring locating collars as m the first embodiment. However, as analternative, the spring locating collars 13 of the present embodimentare desirably adapted to surround the outer coils of the spring unitsrather than be surrounded by the corresponding coil thereof. Such aconstruction, therefore, gives a spring plank with upstanding flanges atthe edges thereof, as illustrated particularly in Figure 7. On accountof the provision of the bridge portions 47, not only are the springs 7more widely spaced transversely of the frame but the pockets provided bythe upstanding flanges 13" are correspondingly spaced as will beunderstood. Except as specifically described in connection with thepresent embodiment, the construction thereof may correspondsubstantially with that of the first embodiment.

From the foregoing disclosure, it will be apparent that I have devised aside frame with associated spring plank, bolster and bolster springsallowing for increased spring capacity while not radically changing thedimensions of any of the parts and permitting the use of a standard A.R. A. spring plank and springs. When employing the connecting bridge orstrut 47 between the intermediate portions of the bolster guide columns,the frame is greatly strengthened without materially increasing theweight thereof and, at the same time, the springs are protected frombeing compressed solid, normal compression thereof, however, beingpermitted. On account of increasing the width of the tension memberadjacent the center while splitting the bottom web thereof, a largeincrease in transverse strength is provided without material increase inweight. By continuing the web portion 31 outwardly to the inclinedportions of the tension member from the abutments and, if used, from thebrid portions 47, provision is made for the su stantially directtransmission of stresses between said bridge portions and thecorresponding inclined portions of the tension member.

Having now described my invention, I claim:

1. A side frame comprising a compression member, a tension member,struts interposed therebctween and spaced to leave a bolster opening,and connecting means extending between intermediate portions of saidstruts above said tension member and comprising transversely spacedchannel portions.

2. A side frame comprising a compression member, a tension member,bolster guide columns positioned therebetween and spaced to leave awindow opening, the intermediate portions of said bolster guide columnsbeing connected by a longitudinally extending bridge portion of lesswidth than and spaced, for its entire length, from the tension member.

3. A side frame comprising a compression member, a tension member spacedat intermediate portions thereof by bolster guide columns leaving awindow opening therebetween, that portion of the tension member, beneaththe window opening, being laterally widened for supporting bolstersprings, and

a bridge portion connecting said bolster guide columns above saidlaterally widened portion of the tension member and comprising laterallyspaced portions permitting the insertion of a plurality oflongitudinally disposed bolster springs therebctween.

4. A side frame comprising compression and tension members spaced atintermediate portions by bolster guide columns leaving a window openingtherebctween, said window opening being divided into an upper portionadapted for the insertion of a bolster and a lower portion adapted forthe reception of a spring plank by a member connecting intermediateportions of said guide columns.

5. A side frame comprising a compression member, a tension member,struts interposed therebetween and spaced to leave a bolster opening,stop portions extending toward each other from intermediate portions ofsaid struts leaving room thereabove for the insertion of the bolster andadapted to limit downward movement thereof, the opening therebeneathbeing of a size suflicient for receiving an associated spring plank.

6. A side frame comprising acompression member, a tension member,bolster guide columns interposed between said compression and tensionmembers and spaced to leave a window opening therebctween, thoseportions of the tension member, beyond the bolster guide columns,extending diagonally upward and outward to join the compression memberadjacent the ends thereof, and girder means connecting intermediateortions of said bolster guide columns and ormed as a plurality ofchannel sections with inwardly extending flanges.

7. A side frame comprising a compression member, a tension member,bolster guide columns positioned therebetween and spaced apart to leavea window opening, said window opening comprising an upper portionadapted to receive an associated bolster and a lower portion forreceiving an associated spring plank, said guide columns being providedwith projections overlying the opening for receiving the spring plankand underlymg the opening for the bolster for limiting downward movementthereof.

8. A side frame comprising a compression member, a tension member,struts interposed therebetween and spaced to leave a bolster opening,said tension member being formed with a laterally widened upper webbeneath the bolster opening for supporting a nest of springs ofincreased width, the tension member, as a whole, gradually increasing inwidth from the ends thereof toward that portion beneath the bolsteropening, said tension member, at the ends, being generallychannel-shaped in cross section, the bottom web of said member, however,being split adjacent the bolster guide columns and continued under thebolster opening with a relatively great separation between the parts ofsaid web, whereby increased transverse strength of the tension member issecured without material increase in the weight thereof.

9. A side frame comprising a compression member, a tension member,bolster guide columns interposed therebetween and spaced to leave awindow opening, said tension member, beneath the window opening, beingformed with an upper Web laterall widened for supporting a nest ofsprings 0 increased width, said tension member, adjacent the endsthereof, being generally channel-shaped in cross section, and increasingin width and divided into two spaced sections, angular in crosssect-ion, where it passes beneath the supporting web, said web, beyondthe angular portions of the tension member, being braced with respectthereto b hollow extensions between the upright fianges of the tensionmember and the underside of said we 10. A side frame comprising acompression member, a tension member, bolster guide columns positionedtherebetween and spaced .to leave a bolster opening, the intermediateportions of said bolster guide columns being formed with inwardlyextending abutment or stop portions adapted to limit downward movementof the bolster and means for rigidifying the connection between thelower portions of the bolster guide columns and the tension membercomprising longitudinally extendin webs forming outward continuations oft e sides of the stop portions extending to merge with the tops ofinclined end portions of the tension member at substantially theelevation of the tops of the stop members.

11. A side frame comprising a compression member, a tension member,struts interposed therebetween and spaced to leave a bolster opening, abridge ortion connecting intermediate portions 0 said struts and spacedfor its full length from the top and bottom of said bolster and meansfor transmitting force substantially directl to inclined portions of thetension mem r comprising longitudinally extending webs formmg outwardcontinuations of the bridge portions and extended to merge with the topsof the inclined portions of the tension membar at substantially the sameelevation.

12. In a car truck, incombination, a side frame formed with compressionand tension members, spaced at intermediate portions .by bolster gu decolumns, leavin a window opening therebetween, the tension member,beneath" the windowopening, being laterally widened for supporting anest of springs of increased width, a spring plank supported on saidspring seating portion and formed of standard A. R. A. dimensions withstandard A. R. A. squaring lug apertures, a spring plate positioned onsaid spring plank and provided with means for positioning associatedbolster springs, said spring plate being also formed with dependingbosses adapted to register with the squaring apertures in the springplank and pass therethrough into corresponding pockets in the springplank seat portion of the frame for holding said plank in squaredrelation with respect thereto.

13. In a car truck, in combination, a side frame formed with a windowopening and a spring plank seat portion underlying said opening, aspring plank positioned on said seat portion and formed with squaringapertures therethrough, the spring plank seat portion, beneath saidapertures, being provided with registering pockets and a spring plateresting on said plank and formed with upstanding spring-positioningmeans and depending portions passing through the squaring apertures inthe plank and into pockets in the seat portion for holding said plank insquared relation with respect to the frame.

14. In a car truck, in combination, a side frame formed with acompression member, a tension member, struts interposed therebetween andspaced to leave a bolster opening, said tension member being formed withan upper web laterally widened for supporting a nest of springs ofincreased width, and a six unit nest of springs supported by means ofsaid u per web and arranged as two longitudinal y spaced transverselydisposed rows'of spring units.

15. In a car truck in combination, a side frame formed with acompression member, a tension member, bolster guide columns disposedbetween intermediate portions of said members and spaced to leave awindow opening, the tension member, beneath the window opening, beingformed with a spring plank seating web laterally widened for supportinga nest of springs of increased width, a spring plank supported on saidspring plank seat portion and a spring plate supported on said springlank, said spring plank being of standard R. A. dimensions and,therefore, stopping short of the sprin plank seating web and springplate an means for filling the space between the spring ppm;I and seatportion beyond said spring p an 16. In a car truck, in combination, aside frame formed with compression and tension members, s seed atintermediate portions member, beneath the window opening, being formedwith a spring seating portion, bolster springs supported by means ofsaid spring seating portion, a bolster associated with said frame andadapted for direct insertion into the bolster opening above saidsprings, said bolster being formed with guiding flanges extendingoutwardly toward the bolster guide columns but not engaging said columnsand removable flanged wear blocks insertable between said columns andbolster and each formed with outwardly extending flanges engaging thecorresponding guide columns to prevent transverse motion therebetweenand inwardly extending flanges engaging the flanges of the bolster forpreventing transverse motion therebetwecn.

17. In a car truck, in combination, a side frame formed With compressionand tension members, spaced at intermediate portions thereof by bolsterguide columns, leaving a window opening therebetween, the tensionmember, beneath the window opening, being formed with a spring seatingportion, bolster springs supported by means of said spring seatingportion, a bolster associated with said frame and adapted for directinsertion into the bolster opening above said springs, said bolsterbeing formed with guiding portions extending outwardly toward thebolster guide columns but not engaging said columns and removableflanged wear members insertable between said columns and bolster andeach formed with outwardly extending portions adapted to engage thecorresponding guide columns to prevent transverse motion therebetweenand inwardly extending portions adapted to engage the guiding portionsof the bolster for preventing transverse motion therebetwcen, the lowerportions of said wear blocks being flared downwardly to forn'r baseportions of increased area for resting upon the springs, the bolsterbeing correspondingly formed for cooperating therewith.

18. A spring plate for a nest of springs formed with means for spacingsaid springs and means normally depending from the bottom surfacethereof for passing through corresponding apertures in an associatedspring plank into corresponding pockets in an associated frame forlocking said spring plank in squared relation with respect to saidframe.

In testimony whereof I affii my signature.

DONALD S. BARROVVS.

